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Physics - Geometrical Optics Question with Solution | TestHub

PhysicsGeometrical OpticsTIR/Prism and DispersionMedium2 minQB

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On an equilateral prism, it is observed that a ray strikes grazingly at one face and if refractive index of the prism is $2$ then the angle of deviation is

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Solution:

Grazing incidence: $i = 9 0^{\circ}$ , so $sin r_{1} = \frac{1}{2}$ , $r_{1} = 3 0^{\circ}$

$r_{2} = 6 0^{\circ} - 3 0^{\circ} = 3 0^{\circ}$

$sin e = 2 sin 3 0^{\circ} = 1$ , so $e = 9 0^{\circ}$

$δ = i + e - A = 9 0^{\circ} + 9 0^{\circ} - 6 0^{\circ} = 12 0^{\circ}$

Stream:JEESubject:PhysicsTopic:Geometrical OpticsSubtopic:TIR/Prism and Dispersion

⏱ 2mℹ️ Source: QB

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